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13-03-2024 | Research

Multi-DGI: Multi-head Pooling Deep Graph Infomax for Human Activity Recognition

Authors: Yifan Chen, Haiqi Zhu, Zhiyuan Chen

Published in: Mobile Networks and Applications

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Abstract

Human Activity Recognition (HAR) is a crucial research domain with substantial real-world implications. Despite the extensive application of machine learning techniques in various domains, most traditional models neglect the inherent spatio-temporal relationships within time-series data. To address this limitation, we propose an unsupervised Graph Representation Learning (GRL) model named Multi-head Pooling Deep Graph Infomax (Multi-DGI), which is applied to reveal the spatio-temporal patterns from the graph-structured HAR data. By employing an adaptive Multi-head Pooling mechanism, Multi-DGI captures comprehensive graph summaries, furnishing general embeddings for downstream classifiers, thereby reducing dependence on graph constructions. Using the UCI WISDM dataset and three basic graph construction methods, Multi-DGI delivers a minimum enhancement of 2.9%, 1.0%, 7.5%, and 6.4% in Accuracy, Precision, Recall, and Macro-F1 scores, respectively. The demonstrated robustness of Multi-DGI in extracting intricate patterns from rudimentary graphs reduces the dependence of GRL on high-quality graphs, thereby broadening its applicability in time-series analysis. Our code and data are available at https://​github.​com/​AnguoCYF/​Multi-DGI.​

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Appendix
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Literature
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Metadata
Title
Multi-DGI: Multi-head Pooling Deep Graph Infomax for Human Activity Recognition
Authors
Yifan Chen
Haiqi Zhu
Zhiyuan Chen
Publication date
13-03-2024
Publisher
Springer US
Published in
Mobile Networks and Applications
Print ISSN: 1383-469X
Electronic ISSN: 1572-8153
DOI
https://doi.org/10.1007/s11036-024-02306-y